JP6602467B2 - Laminated iron core and manufacturing method thereof - Google Patents

Description

  The present invention relates to an iron core structure such as an electric motor or a transformer, and more particularly to a laminated iron core in which a plurality of laminated cores in which plate-like core pieces are laminated are connected in a ring shape and a method for manufacturing the same.

Conventionally, as a stator of an electric motor, a laminated core obtained by laminating press-cut sheet-like core pieces has been used as an iron core device. By forming a laminated core consisting of core pieces in a shape where each tooth is connected in a straight line through a thin part with a mold, the laminated core can be wound as a unit, and its ends are bent into an annular shape. The structure which can obtain an iron core device is indicated (for example, refer to patent documents 1).
Moreover, the structure which obtains an iron core apparatus by aligning the convex part formed in the laminated | stacked core edge part and the recessed part of an opposite edge part, and inserting in a product width direction is disclosed (for example, patent document 2). reference).

Japanese Patent Laid-Open No. 10-1778749 (paragraphs [0022] to [0024] and FIGS. 1 and 3) Japanese Patent Laid-Open No. 10-271770 (paragraphs [0012] to [0014] and FIG. 1)

  However, in the invention disclosed in Patent Document 1, the productivity of the laminated core is good and winding and conveyance are easy. However, since the mold and the press device are enlarged, a large investment is required and the number of production units is small. Was difficult to apply. Further, in the invention disclosed in Patent Document 2, since the laminated core is inserted in the stacking width direction by aligning the convex portion and the concave portion, galling occurs at the time of insertion, and there is a concern that the end portion cannot be inserted.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laminated iron core that can easily connect laminated cores and that can reduce the size of a mold, and a method for manufacturing the same.

A laminated iron core according to the present invention is a laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed, and has a convex portion at one end of the laminated core. A structure having a recess at the other end of the laminated core, a notch in a part on the outer peripheral side of the recess, and the recess being deformable into a C shape so as to form a hole surrounding the protrusion the have a thin portion part of the outer peripheral side of the recess having a notch, notch, the laminated cores have a relief groove and slidable recess is in capable variant of two-stage construction The first stage of deformation that connects the laminated cores in a slidable state in the circumferential direction due to the U-shaped recess and the state where the stacked cores do not move due to the C-shaped recess. The core of the laminated core has a second stage deformation that is fixed at Those that can be slid away to each other.
The laminated core according to the present invention is a laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed, and has a convex portion at one end of the laminated core. Has a recess at the other end of the laminated core, has a notch on a part of the outer periphery of the recess, and the recess can be deformed into a C shape to form a hole surrounding the protrusion A part of the outer peripheral side of the recess having a notch is a thin part, and the notch has an escape groove that allows the laminated cores to slide with each other and is in contact with the outer end of the recess Further, it has a structure having a projecting portion extending in the radial direction on the outer peripheral side of the convex portion, and prevents the concave portion from returning to the deformation by the springback after the concave portion is deformed into a C shape.
The laminated core according to the present invention is a laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed, and has a convex portion at one end of the laminated core. Has a recess at the other end of the laminated core, has a notch on a part of the outer periphery of the recess, and the recess can be deformed into a C shape to form a hole surrounding the protrusion The concave part is a structure that can be deformed in two steps, and the concave part is U-shaped, so that the laminated cores can be connected in a slidable state in the circumferential direction without causing the laminated cores to come off. , a first stage of deformation is Ru can be slid in a direction away tooth portions of the laminated core, that the recess is the C-shape, deformation of the second stage of fixed while the laminated cores from moving It is what has.
The laminated core according to the present invention is a laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed, and has a convex portion at one end of the laminated core. Has a recess at the other end of the laminated core, has a notch on a part of the outer periphery of the recess, and the recess can be deformed into a C shape to form a hole surrounding the protrusion It has a structure that has a projecting portion extending radially on the outer peripheral side of the convex portion at a position in contact with the outer peripheral end portion of the concave portion, and the deformation is restored by the springback after the concave portion is deformed into a C shape. This is to prevent this.
The laminated core according to the present invention is a laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed, and has a convex portion at one end of the laminated core. Has a recess at the other end of the laminated core, has a notch on a part of the outer periphery of the recess, and the recess can be deformed into a C shape to form a hole surrounding the protrusion The protrusion on the outer diameter side constituting the recess has a structure in which a protrusion is provided on the inner diameter base side of the protrusion and a valley is provided on the tip end side of the inner diameter, while a protrusion is provided on the outer diameter side of the base of the protrusion. the structure, when arranging the laminated cores in a linear state, overhanging Zhang Ri out and the convex portion of the concave portion are in contact, the laminated core without departing each other, be slid in a direction away tooth portions of the laminated core can, when arranged laminated cores in an annular state, the recess of the valley and the convex Zhang Ri out has the structure to be fitted in.

A method for manufacturing a laminated iron core according to the present invention is a method for producing a laminated iron core in which a plurality of laminated cores are connected to form a ring, and has a convex portion at one end of the laminated core. Using a laminated core that has a recess at the other end, has a notch at a part of the outer periphery of the recess, and the recess can be deformed into a C shape so as to form a hole surrounding the protrusion. An alignment step of inserting the convex portion of the first laminated core into the concave portion of the second laminated core, and forming a hole surrounding the convex portion of the first laminated core by deforming the concave portion into a U shape. A temporary connection step that prevents sliding of the laminated cores and allows the teeth portions of the laminated cores to slide away from each other without coming off, and a winding step of winding the teeth portions of the laminated cores. , This connecting work to deform the recess from U-shaped to C-shaped and fix the laminated cores in an annular shape When, those having a.

  The laminated iron core according to the present invention has a notch in a part on the outer peripheral side of the concave portion, and the concave portion is a structure that can be deformed into a C shape so as to form a hole portion surrounding the convex portion. The laminated cores can be easily connected and the mold can be miniaturized.

According to the method for manufacturing a laminated core according to the present invention, the concave portion is deformed into a U shape to form a hole surrounding the convex portion of the first laminated core, and the laminated cores are prevented from being separated from each other. Temporary connection process that can slide the teeth of the laminated cores away from each other without detaching the cores, and main connection to fix the laminated cores in an annular shape by deforming the recesses from U-shaped to C-shaped Therefore, the laminated iron core laminated core can be easily connected, and the mold can be miniaturized.

It is sectional drawing which shows the structure of the laminated iron core of the electric motor which concerns on Embodiment 1 of this invention. It is the perspective view and top view which show the state before the connection which concerns on the laminated iron core of Embodiment 1 of this invention. It is a principal part enlarged view of the top view which shows the state before the connection of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is the perspective view and top view which show the alignment process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is the perspective view and top view which show the temporary connection process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is a principal part enlarged view of the top view which shows the temporary connection process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is the perspective view and top view which show the temporary connection process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is a principal part enlarged view of the top view which shows the temporary connection process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is the perspective view and top view which show this connection process of the lamination | stacking core which concerns on the laminated iron core of Embodiment 1 of this invention. It is a principal part enlarged view of the top view which shows this connection process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the winding process of the laminated core of the comparative example which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the rounding process of the laminated core of the comparative example which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the winding process which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the temporary connection process which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the temporary connection process which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the manufacturing process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the winding process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of the winding process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of this coupling | bonding process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is explanatory drawing of this coupling | bonding process of the laminated core which concerns on the laminated iron core of Embodiment 1 of this invention. It is a flowchart which concerns on the manufacturing method of the laminated iron core of Embodiment 1 of this invention. It is the top view and principal part enlarged view which show the state before the connection of the laminated core which concerns on the laminated iron core of Embodiment 2 of this invention. It is the top view and principal part enlarged view which show the position alignment process which concerns on the laminated iron core of Embodiment 2 of this invention. It is the top view and principal part enlarged view which show the temporary connection process which concerns on the laminated iron core of Embodiment 2 of this invention. It is the top view and principal part enlarged view which show this connection process which concerns on the laminated iron core of Embodiment 2 of this invention. It is the top view and principal part enlarged view which show the state before the connection of the laminated core which concerns on the laminated iron core of Embodiment 3 of this invention. It is the top view and principal part enlarged view which show the position alignment process which concerns on the laminated iron core of Embodiment 3 of this invention. It is the top view and principal part enlarged view which show this connection process which concerns on the laminated iron core of Embodiment 3 of this invention. It is the top view and principal part enlarged view which show the rounding process which concerns on the laminated iron core of Embodiment 3 of this invention.

Embodiment 1 FIG.
Embodiment 1 has a core convex part at the first end of the laminated core, a core concave part at the second end of the laminated core, and the core concave part at the second end of the laminated core is a jaw-shaped protrusion. The jaw-shaped projection has a structure that can be deformed in two stages so as to form a hole surrounding the core convex portion of the first end portion with the slide guide projection. (Hereinafter referred to as the first deformation) can slide the laminated cores without detaching the laminated cores, and the second stage deformation (hereinafter referred to as the second deformation) A laminated iron core having a structure in which cores are connected to form an annular laminated iron core, and a method of manufacturing a laminated iron core comprising an alignment step, a temporary connecting step, a winding step, and a main connecting step It is about.

  FIG. 1 is a cross-sectional view showing the configuration of the laminated core of the electric motor and the manufacturing method thereof according to Embodiment 1, FIG. 2, FIG. 3 is an enlarged view of the main part of FIG. 2, FIG. 4 is a perspective view and a plan view showing the alignment step, FIG. 5 and FIG. 7, FIG. 5 and FIG. 6 and 8 which are enlarged views of the main part of FIG. 7, a perspective view and FIG. 9 which is a plan view of the connecting process, FIG. 10 which is an enlarged view of the main part of FIG. 9, and a winding process of the laminated core of the comparative example FIG. 11 is an explanatory diagram of FIG. 12, FIG. 12 is an explanatory diagram of the rounding process of the laminated core of the comparative example, FIG. 13 is an explanatory diagram of the winding process of the laminated core according to the first embodiment, and an explanation of the temporary connecting process 14 and 15 which are diagrams, FIGS. 16 to 18 which are explanatory diagrams of a winding process, and an explanatory diagram of a main connecting process. 9 will be described with reference to FIG. 21 is a flowchart according to the manufacturing method of FIG. 20, and stacked core.

First, as an example of an apparatus to which the laminated iron core of the first embodiment is applied, the configuration of the laminated iron core of the electric motor will be described based on FIG. 1 and the basic configuration of the laminated core will be described based on FIG. 2A is a perspective view of the laminated core, and FIG. 2B is a plan view of the laminated core.
FIG. 1 is a cross-sectional view showing a configuration of a laminated iron core of an electric motor. The laminated iron core 1 has a configuration in which a plurality of laminated cores 10 are connected in a ring shape, and a winding 2 is wound around the laminated core 10. The laminated cores 10 are connected to each other by fitting the core convex portion 11a and the core concave portion 12a.
2A and 2B, a laminated core 10 is obtained by laminating and fixing a plate-like core piece 13 made of a magnetic material in the axial direction. The laminated core 10 includes a back yoke portion 14 and a tooth portion 15. The laminated core 10 includes a first end portion 11 and a second end portion 12. The first end portion 11 is formed with a core convex portion 11a as a connecting means, and the second end portion 12 is formed with a core concave portion 12a for connection with the core convex portion 11a. As a means for fixing the layers, adhesion, welding, caulking by dowels, or a combination thereof is used.

  Next, the connection procedure (positioning, temporary connection, main connection process) of the laminated core 10, the winding process, the temporary connection using a jig, and the main connection process will be described. In the description of the winding process, the winding process of the laminated core of the comparative example will also be described in order to clarify the features of the laminated core of the first embodiment and the manufacturing method thereof.

First, the state before the connection of the laminated cores 10 and the alignment process will be described with reference to FIGS. 4A is a perspective view showing the alignment step, and FIG. 4B is a plan view.
2 (a) and 2 (b), adjacent cores 11a and core recess 12a are brought close to each other, and the positions of inner locking step 11e and inner locking projection 12e in FIG. Together to obtain the states of FIGS. 4 (a) and 4 (b). At this time, as shown in FIG. 3, the opening width of the core recess 12a surrounded by the jaw-shaped protrusion 12b and the slide guide protrusion 12d is larger than the width of the core protrusion 11a, so that the alignment can be performed smoothly.
In FIG. 3, the first end portion 11 further includes an outer slide relief groove 11b, an outer latching step 11c, an inner slide relief groove 11d, a convex side end surface 11f, a springback prevention projection 11g, and a core rounding latch. A recess 11h is provided. Further, the second end portion 12 is further provided with an outer locking projection 12c, a recess-side end surface 12f, a thin portion 12g, and a deformation relief groove 12h. These functions and roles will be sequentially described later.

Next, the temporary connection process of the lamination | stacking core 10 is demonstrated based on FIGS. 5 (a) and 7 (a) are perspective views showing a temporary connecting step, and FIGS. 5 (b) and 7 (b) are plan views.
By applying a force to the jaw-shaped protrusion 12b to cause the first deformation, the laminated core 10 is in the state shown in FIGS. 5 (a) and 5 (b). Due to the first deformation of the jaw-shaped protrusion 12b, the opening width of the core recess 12a becomes smaller than the width of the core protrusion 11a, and the laminated cores 10 can be handled as a unit. That is, the core recess 12a is U-shaped.
FIG. 6 is an enlarged view of a main part in which the periphery of the jaw-shaped protrusion 12b is enlarged. The jaw-shaped protrusion 12b and the slide guide protrusion 12d form a hole 12p. Since the width of the outer locking projection 12c at the tip of the jaw projection 12b and the inner locking projection 12e at the tip of the slide guide projection 12d is narrower than the width of the core projection 11a, the stacked cores 10 do not come apart.
Here, since the jaw-shaped protrusion 12b is connected to the plate-shaped core piece 13 via the thin-walled portion 12g and the deformation relief groove 12h, the force necessary for the deformation of the jaw-shaped protrusion 12b can be reduced. Further, the deformation relief groove 12h suppresses out-of-plane deformation and springback, thereby improving the shape accuracy.

  Next, the laminated cores 10 are brought into a state shown in FIGS. 7A and 7B by sliding the laminated cores 10 closer to each other. FIG. 8 is an enlarged view of a main part in which the periphery of the jaw-shaped protrusion 12b is enlarged. It is prevented that the laminated cores 10 are separated from each other by meshing the outer latching protrusion 12c and the outer latching step 11c, and the inner latching projection 12e and the inner latching step 11e. Further, by providing the outer slide relief groove 11b and the inner slide relief groove 11d, the laminated cores 10 can be slid in the direction of approaching each other.

Next, the main connection step of the laminated core 10 will be described with reference to FIGS. FIG. 9A is a perspective view showing this connection step, and FIG. 9B is a plan view.
The laminated core 10 is deformed into an annular shape. Further, by applying a force to the jaw-shaped protrusion 12b to cause deformation (second deformation) further toward the inner diameter side of the laminated core 10 than the temporary connection, the laminated core 10 becomes the state shown in FIGS. 9 (a) and 9 (b). That is, the core recess 12a is C-shaped.
FIG. 10 is an enlarged view of a main part in which the periphery of the jaw-shaped protrusion 12b is enlarged.
At the same time, the laminated core 10 is rotated so that the concave-side end face 12f of one laminated core 10 and the convex-side end face 11f of the laminated core 10 to be connected are abutted to form an annular shape. .
After the winding described later is wound, the multi-layer core 10 shown in FIG. 1 is formed by performing the main connection to the plurality of laminated cores 10.

In FIG. 10, the jaw-shaped projection 12b after the second deformation is accommodated inside the outer slide escape groove 11b by the springback prevention projection 11g. To deform the jaw projection 12b, a force may be applied from the outside with a jig or the like, or a force may be applied by pressing the jaw projection 12b with the springback prevention projection 11g by a force that rotates the laminated core 10. . Since the shape of the inner slide relief groove 11d is a polygon, the slide guide protrusion 12d is accommodated in the inner slide relief groove 11d even when the laminated core 10 is rotated. Further, the inner locking projection 12e provided at the tip of the slide guide projection 12d and the core rounding locking recess 11h provided at the base of the core projection 11a mesh with each other, thereby locking the laminated core 10 after the annular formation.
In FIG. 10, after the core recess 12a is deformed into a C shape, a space (relief allowance) remains in the deformation relief groove 12h. This acts as a relief groove.

Here, correspondence with the description of the claims will be described.
The convex part of the claims is the core convex part 11a, the concave part is the core concave part 12a, the outer peripheral side of the concave part is the jaw-shaped protrusion 12b, the notch is the deformation relief groove 12h, and the hole part is the hole part 12p.
The thin part in the claims is the thin part 12g.
The protrusion extending in the radial direction on the outer peripheral side of the convex part in the claims is a springback prevention protrusion 11g.
The protrusion provided at the tip on the inner diameter side of the concave portion of the claims is the inner locking convex portion 12e, and the trough portion on the inner diameter side of the base of the convex portion having a shape matching the protrusion provided at the tip portion on the inner diameter side of the recess It is a core rounding locking recess 11h.

Next, the winding process performed after the temporary connection process demonstrated previously is demonstrated based on FIGS.
In the laminated iron core and the manufacturing method thereof according to Embodiment 1, the teeth portions 15 of the laminated core 10 can be slid in the direction away from each other, as described in the temporary connection step of FIG. Because of this feature, it is possible to increase the winding space between the teeth 15 of the laminated core 10 and wind more windings.

In order to clarify this feature of the laminated core and the manufacturing method thereof according to the first embodiment, first, the winding process and the rounding process of the laminated core of the comparative example will be described with reference to FIGS.
FIGS. 11A and 11B show a winding process of the laminated core 110 of the comparative example. Here, FIG.11 (b) is the figure which expanded the two laminated cores 110 of the right end of Fig.11 (a).
The laminated core 110 of the comparative example is connected via the slit part 110a and the thin part 110b. The laminated core 110 includes a back yoke portion 114 and a tooth portion 115.
The laminated core 110 is fixed by a winding machine core chuck 51. After winding the winding 2 using the winding machine nozzle 50, the thin portion 110b is plastically deformed and arranged in an annular shape, and the laminated core 110 is fixed by the core end joint 110c, and the annular shape shown in FIG. The iron core device 101 of the comparative example is formed. For the core end joint 110c, welding or adhesion is used.

  Here, the problem of the laminated core 110 of the comparative example will be described. In FIG. 11B, the winding machine nozzle 50 and the winding 2 interfere when the winding 2 is wound around the left tooth portion 115 after the winding 2 is wound around the rightmost tooth portion 115. When the distance A between the laminated cores is increased, the outer diameter of the iron core device 101 of the comparative example is also increased, and as a result, the electric motor is increased in size. When the outer diameter of the iron core device 101 of the comparative example is not changed, it is necessary to reduce the number of coils to be wound, and as a result, the efficiency of the electric motor is lowered.

In contrast, FIGS. 13A and 13B show the winding process of the laminated iron core and the manufacturing method thereof according to the first embodiment. FIG. 13A shows a state in which the winding space is expanded between the tooth portions 15 of the laminated core 10 and the winding is wound. FIG. 13B shows a state in which the winding space between the tooth portions 15 of the laminated core 10 is narrowed after the winding is finished. Note that, for the winding machine core chuck 51 for the laminated core 110 of the comparative example, the winding machine core chuck 52 of the first embodiment is used as the winding machine core chuck 52.
After the laminated core 10 is fixed by the winding machine core chuck 52, the winding 2 and the winding machine nozzle 50 do not interfere with each other by sliding them in the directions away from each other to obtain a distance B (B> A) between the laminated cores. For this reason, more windings can be wound than the laminated core 110 of the comparative example, and as a result, the efficiency of the electric motor can be improved.
After winding, as shown in FIG. 13B, the laminated cores 10 are slid in the direction to bring them closer together, and the distance B between the laminated cores is reduced to the distance A between the laminated cores, so that the same as the laminated core 110 of the comparative example. The distance between the laminated cores is A, and the laminated iron core 1 shown in FIG. The laminated iron core 1 of the first embodiment has the same outer diameter as that of the iron core device 101 of the comparative example and can wind more coils.
Therefore, the laminated iron core and the manufacturing method thereof according to Embodiment 1 can facilitate the winding work and improve the line area ratio.

Next, application of the jig in the temporary connection step will be described with reference to FIGS.
First, the case where one temporary connecting jig punch is used will be described with reference to FIG.
FIG. 14A shows a method of arranging a pair of laminated cores 10 to be connected to the temporary connecting jig 60. FIG. 14B shows a state in which the laminated core 10 is aligned. FIG. 14C shows a state where the first deformation of the jaw-shaped protrusion 12b is performed and the temporary connection is completed.

The temporary connection jig 60 includes a temporary connection jig base 61 for positioning the laminated core 10 and a temporary connection jig punch 63 for pressing and deforming the jaw-shaped protrusion 12b.
A core positioning projection 62 is formed on the temporary connecting jig base 61, and positioning is performed by aligning the convex-side end surface 11f and the concave-side end surface 12f of the laminated core 10 with the core positioning projection 62 (FIG. 14B). State). Next, the temporary connection jig punch 63 is used to apply a force to the jaw projection 12b to perform the first deformation, thereby completing the temporary connection (state shown in FIG. 14C).
In addition, the front-end | tip part of the convex part side end surface 11f has a right angle or inclination. Further, the recess-side end surface 12f has a right angle or an inclination on the inner diameter side of the base.
Here, the protrusion provided on the inner diameter side of the base of the convex portion in the claims is the convex-side end surface 11f, and the inner-diameter-side protrusion constituting the concave portion is the concave-side end surface 12f.

Next, the case where the collective temporary connecting jig is used will be described with reference to FIG. FIG. 15A shows a state where a plurality of laminated cores 10 are aligned and installed on a jig. FIG. 15B shows a state in which the first deformation of the jaw-shaped protrusion 12b is collectively performed and the temporary connection is completed. Here, the temporarily connected laminated core 10 is referred to as a temporarily connected laminated core 16.
The temporary connection jig 60 in FIG. 14 is a jig that temporarily connects one place at a time, but the collective temporary connection jig 64 shown in FIG. 15 can temporarily connect a plurality of connection positions simultaneously. it can.
A plurality of laminated cores 10 are arranged on the collective temporary connecting jig base 65 (the state shown in FIG. 15A), and the first deformation is simultaneously performed on the jaw projections 12b by the collective temporary connecting jig punch 66. Then, the temporarily connected laminated cores 16 can be formed (state shown in FIG. 15B). As a result, the time for temporary connection per laminated core 10 can be shortened.

Next, a winding process for winding the winding 2 around the plurality of laminated cores 10 will be described with reference to FIGS. Here, the wound laminated core 10 is referred to as a laminated core 17 after winding.
The winding process of FIG. 13 shows an example in which the winding machine nozzle 50 is one, but it is also possible to wind the laminated cores 16 temporarily connected as shown in FIGS. The winding machine body (not shown) includes a plurality of winding machine core chucks 52, a winding machine core chuck base 54 that fixes the winding machine core chuck 52 in a slidable state, and a plurality of winding machine nozzles 50. A winding machine nozzle holder 53 for fixing the winding machine nozzle 50. First, as shown in FIG. 16, the temporarily connected laminated core 16 is attached to the winding machine core chuck 52. At this time, the temporarily connected laminated cores 16 are slid in a direction to reduce the distance between the tooth portions 15 of the laminated core 10 to increase the contact points of the connecting parts, thereby improving the rigidity of the whole core, and conveying and winding machines. Attachment to the core chuck 52 is facilitated. Next, as shown in FIG. 17, the winding machine core chuck 52 is slid in the direction of increasing the distance between the teeth 15 of the laminated core 10, and then a plurality of winding machine nozzles attached to the winding machine nozzle holder 53. 50 is used to simultaneously wind the winding 2 around all the teeth portions 15 of the temporarily connected laminated cores 16. After the winding is completed, as shown in FIG. 18, the winding machine nozzle 50 is retracted, and then the winding machine core chuck 52 is slid in a direction to reduce the distance between the tooth portions 15 of the laminated core 10. The subsequent laminated core 17 is removed from the winding machine core chuck 52.

Next, the application of the jig in the main connection step in which main connection is performed to the connection portion of the laminated core 17 after winding to form the annular laminated core 1 will be described with reference to FIGS. 19 and 20.
First, a case where the main connection push claw 70 is applied to perform the main connection will be described with reference to FIG.
As shown in FIG. 19A, the laminated core 17 after winding is rounded into an annular shape, and a force is applied from the outer peripheral side with the main connecting push claws 70 to jump out of the outer diameter of the laminated core 17 after winding. The main connection is performed by performing the second deformation on the jaw-shaped protrusion 12b, and the laminated iron core 1 is formed as shown in FIG.
In FIG. 19, there are three main connecting push claws 70, but two may be used, or four or more.

Next, a case where the main connection is performed by applying the main connection core rod 71 and the main connection push roller 72 will be described with reference to FIG. Here, Fig.20 (a) shows the structure of a jig | tool, FIG.20 (b), (c) is explanatory drawing of the point of this connection.
The connecting jig includes a main connecting core 71 for positioning the inner diameter of the laminated core 17 after winding, and a main connecting push roller 72 for deforming the jaw-shaped protrusion 12b by applying a force. The
In FIG. 20B, the laminated core 17 after winding is wound around the connecting core rod 71. At this time, the laminated core 10 can also be fixed by generating a magnetic attractive force on the connecting core rod 71 using an electromagnet or a permanent magnet. Next, a force is applied to the main connecting push roller 72 to press the laminated core 17 after winding onto the main connecting core 71, and the second protrusion 12b protrudes from the outer diameter of the laminated core 17 after winding. To make this connection. By rotating the main connecting core rod 71 and the laminated core 17 after winding in the direction of the arrow in FIG. For this reason, it is possible to perform the main connection in a short time.

Next, the manufacturing method of the laminated core of the first embodiment described above will be described based on the flowchart of FIG.
The method for manufacturing the laminated core of the first embodiment has a core convex portion 11a at the first end 11 of the laminated core 10 and a core concave portion 12a at the second end 12 of the laminated core 10. The core recess 12a of the second end 12 of the laminated core 10 has a jaw projection 12b and a slide guide projection 12d. The jaw projection 12b has a first end formed by the jaw projection 12b and the slide guide projection 12d. The laminated core 10 having a structure that can be deformed in two stages so as to form a hole 12p surrounding the 11 core convex portions 11a is used. In the first modification, the laminated cores 10 can be slid without being separated from each other, and in the second modification, the laminated cores 10 are connected to each other. The manufacturing method of the laminated iron core according to the first embodiment includes the following steps 1 (S01) to 4 (S04).

  In the alignment process of Step 1 (S01), the core protrusion 11a of the first laminated core 10 is inserted into the core recess 12a of the second laminated core 10, and the second lamination with the first laminated core 10 is performed. Alignment with the core 10 is performed.

  In the temporary connection step of Step 2 (S02), the first deformation is performed on the jaw-shaped protrusion 12b of the laminated core 10 to reduce the opening width of the core recess 12a. A hole 12p is formed by the jaw-shaped protrusion 12b and the slide guide protrusion 12d. This prevents the laminated cores 10 from coming off.

  In the winding process of Step 3 (S03), the laminated cores 10 are slid to wind the winding 2 around the tooth portion 15 of the laminated core 10 in a state where the interval between the tooth portions 15 is widened. The cores 10 are slid to narrow the interval between the teeth portions 15.

  In the main connecting step of Step 4 (S04), the plurality of laminated cores 10 around which the windings 2 are wound are arranged in an annular shape, and the second deformed portions 12b of the laminated core 10 are subjected to the second deformation to be connected and fixed. The laminated iron core 1 is formed.

As described above, the first embodiment has a core convex portion at the first end of the laminated core, a core concave portion at the second end of the laminated core, and a core at the second end of the laminated core. The recess has a jaw projection and a slide guide projection, and the jaw projection has a structure that can be deformed in two stages so as to form a hole surrounding the core projection at the first end with the slide guide projection. In the first modification, the laminated cores can be slid without being separated from each other, and in the second modification, the laminated cores are connected to each other to form an annular laminated iron core. The present invention relates to a method for manufacturing a laminated core including a mold core, an alignment step, a temporary connection step, a winding step, and a main connection step.
For this reason, the laminated iron core and the manufacturing method thereof according to the first embodiment can easily connect the laminated cores and reduce the size of the mold. Furthermore, the winding work can be facilitated and the line product ratio can be improved.

Embodiment 2. FIG.
The laminated iron core according to the second embodiment has a simplified structure of the laminated iron core and a method for manufacturing the laminated iron core except for the structure in which the laminated cores are slid between the laminated iron cores according to the first embodiment. Is.

  Hereinafter, with respect to the laminated iron core of the second embodiment and the manufacturing method thereof, FIG. 22 is a plan view showing a state before connection of the laminated cores and FIG. 22 is an enlarged view of the main part, and a plan view and an enlarged view of the main part showing the alignment step. Based on FIG. 23, FIG. 24, which is a plan view showing the provisional connection step, and FIG. 24, which is an enlarged view of the main portion, and FIG. 25, which is a plan view showing the main connection step, and FIG. The explanation is centered.

The connection procedure (positioning, temporary connection, main connection process) of the laminated core 20 will be sequentially described.
First, the state before the connection of the laminated cores 20 and the alignment process will be described with reference to FIGS. 22A is a plan view of the laminated core 20, and FIG. 22B is an enlarged view of a main part. FIG. 23A is a plan view showing the alignment step, and FIG. 23B is an enlarged view of a main part.

  In FIG. 22A, a laminated core 20 is obtained by laminating and fixing plate-like core pieces made of a magnetic material in the axial direction. The laminated core 20 includes a back yoke portion 24 and a tooth portion 25. The laminated core 20 includes a first end 21 and a second end 22. The first end portion 21 is formed with a core convex portion 21a as a connecting means, and the second end portion 22 is formed with a core concave portion 22a for connecting with the core convex portion 21a. As a means for fixing the layers, adhesion, welding, caulking by dowels, or a combination thereof is used.

22B, the first end portion 21 of the laminated core 20 includes an outer slide escape groove 21b and an inner slide relief groove 21d on both sides of the core convex portion 21a. A connection locking projection 21j is provided on a part of the core projection 21a. Further, a convex portion side end face 21f for positioning the laminated core 20 in an annular shape is provided on the inner diameter side.
On the other hand, the second end portion 22 of the laminated core 20 includes a core recess 22a, and a jaw-shaped protrusion 22b and a slide guide protrusion 22d on both sides thereof. The base of the jaw-shaped protrusion 22b includes a thin portion 22g and a deformation relief groove 22h. The outer locking projection 22c is positioned at the distal end of the jaw-shaped protrusion 22b, the main connection locking groove 22j for fitting in the main connection step on the inner diameter side, and the connection locking projection 21j in the temporary connection step. Provisional connection locking projections 22k. Further, on the inner diameter side of the slide guide protrusion 22d, a convex portion side end surface 21f and a concave portion side end surface 22f for positioning are provided.

  The adjacent laminated cores 20 are brought close to each other, and the positions of the core convex portion 21a and the core concave portion 22a are aligned to obtain the states of FIGS. 23 (a) and 23 (b). At this time, since the opening width of the core recess 22a surrounded by the jaw-shaped protrusion 22b and the slide guide protrusion 22d is larger than the width of the core protrusion 21a, the alignment can be performed smoothly.

Next, the temporary connection process of the laminated core 20 will be described with reference to FIG. FIG. 24A is a plan view showing a temporary connection step, and FIG. 24B is an enlarged view of a main part. Here, the temporarily connected laminated core 20 is referred to as a temporarily connected laminated core 26.
By applying a force to the jaw-shaped protrusion 22b to cause the first deformation, the laminated core 20 becomes a state shown in FIG. The jaw-shaped protrusion 22b and the slide guide protrusion 22d form a hole 22p. Due to the deformation of the jaw-shaped protrusion 22b, the core convex portion 21a is fixed by being sandwiched between the slide guide protrusion 22d, the temporary connection locking protrusion 22k, and the core concave portion 22a.
Furthermore, the rotation of the laminated cores 20 is also suppressed by the contact between the outer slide relief groove 21b and the outer locking projection 22c. As a result, the laminated core 26 in which the laminated cores 20 are temporarily connected can be easily transported and wound as a single unit in the same manner as the laminated core 110 of the comparative example.
Here, the jaw-shaped protrusion 22b is connected to the plate-shaped core piece via the thin-walled portion 22g and the deformation relief groove 22h, so that the force required for the deformation of the jaw-shaped protrusion 22b can be reduced. Further, the deformation relief groove 22h suppresses out-of-plane deformation and springback, thereby improving the shape accuracy.

Next, the main connecting step of the laminated core 20 will be described with reference to FIG. FIG. 25A is a plan view showing the connecting step, and FIG. 25B is an enlarged view of a main part.
The laminated core 20 is deformed into an annular shape. Further, by applying a force to the jaw-shaped protrusion 22b to cause deformation (second deformation) further toward the inner diameter side of the laminated core 20 than the temporary connection, the laminated core 20 becomes the state shown in FIG.
Specifically, by rotating the laminated core 20, the concave side end face 22 f of the second end 22 of the laminated core 20 and the convex side end face 21 f of the first end 21 of the laminated core 20 are brought into contact with each other. The laminated cores 20 are arranged in an annular shape. Thereafter, a force is applied to the jaw-shaped protrusion 22b to further deform the inner side of the laminated core 20 from the temporary connection, thereby fixing the laminated core 20 in an annular shape.
As shown in FIG. 25 (b), the coupling locking groove 22j on the inner diameter side of the jaw-shaped protrusion 22b and the coupling locking projection 21j are fitted, and the root of the core projection 21a is the outer locking projection. The laminated cores 20 are fixed by being sandwiched between the portion 22c and the slide guide protrusion 22d. At this time, the slide guide protrusion 22d fits inside the inner slide escape groove 21d.
Note that the protrusion on the inner diameter base side of the outer diameter side projection constituting the concave portion of the claims is the temporary connection locking projection 22k, and the trough portion on the inner diameter tip side of the outer diameter projection forming the concave portion is the main connection locking projection. The overhang on the outer diameter side of the groove 22j and the base of the convex portion is a coupling locking convex portion 21j.

The winding work is omitted because it is the same as that described for the laminated core 110 of the comparative example described in the first embodiment.
Since the laminated iron core of Embodiment 2 is divided for each laminated core, the laminated core can be manufactured with a small mold, and the mold cost can be reduced. On the other hand, since the same process as the laminated core 110 of the comparative example can be used for the winding process, the capital investment cost can be kept low.

Next, a method for manufacturing the laminated iron core according to the second embodiment described above will be described. The flowchart is the same as FIG. 21 of the first embodiment, and will be described with reference to FIG.
In order to distinguish from the first embodiment, the step number will be described as 10th.
The manufacturing method of the laminated core of the second embodiment includes a core convex portion 21a at the first end portion 21 of the laminated core 20, and a core concave portion 22a at the second end portion 22 of the laminated core 20. The core recess 22a of the second end 22 of the core 20 has a jaw-shaped protrusion 22b and a slide guide protrusion 22d. The jaw-shaped protrusion 22b is formed by the jaw-shaped protrusion 22b and the slide guide protrusion 22d. The laminated core 20 having a structure that can be deformed in two steps so as to form a hole surrounding the core convex portion 21a is used. The manufacturing method of the laminated iron core according to the second embodiment includes the following steps 11 (S11) to 14 (S14).

  In the alignment step of step 11 (S11), the core convex portion 21a of the first multilayer core 20 is inserted into the core concave portion 22a of the second multilayer core 20, and the second multilayer core with the first multilayer core 20 is inserted. Align with 20.

  In the temporary connection step of step 12 (S12), the first deformation is performed on the jaw-shaped protrusion 22b of the laminated core 20 to reduce the opening width of the core recess 22a. A hole 22p is formed by the jaw-shaped protrusion 22b and the slide guide protrusion 22d. This prevents the laminated cores 20 from coming off.

  In the winding step of step 13 (S13), the winding 2 is wound around the tooth portion 25 of the laminated core 20.

  In the main connecting step of step 14 (S14), the plurality of laminated cores 20 around which the windings are wound are arranged in a ring shape, the second deformation is performed on the jaw-shaped protrusions 22b of the laminated core 20, and the layers are connected and fixed. Form the core.

  For the laminated core 20 of the second embodiment, the collective temporary connecting jig (collective temporary connecting jig base, collective temporary connecting jig punch) in the temporary connecting process described in the first embodiment is used. Can do. In addition, the main connection jig (the main connection pressing claw, or the main connection core rod and the main connection pressing roller) in the main connection step described in the first embodiment can be used.

  As described above, the laminated iron core according to the second embodiment is simplified as compared with the divided laminated iron core according to the first embodiment except for a structure in which laminated cores are slid together during temporary connection. . For this reason, the laminated iron core and the manufacturing method thereof according to the second embodiment can easily connect the laminated cores, reduce the size of the mold, and reduce the capital investment cost.

Embodiment 3 FIG.
In the third embodiment, the structure of the laminated iron core and the manufacturing method thereof are simplified by changing the jaw-shaped protrusions to only one stage with respect to the laminated iron core of the second embodiment.

Hereinafter, with respect to the laminated iron core of the third embodiment and the manufacturing method thereof, FIG. 26 is a plan view showing a state before connection of laminated cores and FIG. Based on FIG. 27, FIG. 28, which is a plan view showing the connecting step, FIG. 28, which is an enlarged view of the main part, and FIG. 29, which is a plan view showing the rounding step, and FIG. The explanation is centered.
In the first and second embodiments, the laminated cores are connected in two stages, so that they are distinguished from the temporary connection and the main connection. In Embodiment 3, since the connection of the laminated cores is in one stage, the connection process is performed without distinction. Further, the step of forming the laminated core by connecting the laminated cores in an annular shape is a rounding step.

The connection procedure (positioning and connection process) and the rounding process of the laminated core 30 will be sequentially described.
First, the state before the connection of the laminated cores 30 and the alignment process will be described with reference to FIGS. FIG. 26A is a plan view of the laminated core 30, and FIG. FIG. 27A is a plan view showing the alignment step, and FIG. 27B is an enlarged view of the main part.

  In FIG. 26A, a laminated core 30 is obtained by laminating and fixing plate-like core pieces made of a magnetic material in the axial direction. The laminated core 30 includes a back yoke portion 34 and a tooth portion 35. The laminated core 30 includes a first end 31 and a second end 32. The first end portion 31 is formed with a core convex portion 31a as a connecting means, and the second end portion 32 is formed with a core concave portion 32a for connection with the core convex portion 31a. As a means for fixing the layers, adhesion, welding, caulking by dowels, or a combination thereof is used.

In FIG. 26B, the first end portion 31 of the laminated core 30 has an inner slide relief groove 31d on the inner diameter side of the core convex portion 31a, and a convex portion side end surface 31f for positioning the laminated core 30 in an annular shape. With. Moreover, the core convex part 31a is provided with a jaw-shaped protrusion escape concave part 31m partially depressed.
On the other hand, the second end portion 32 of the laminated core 30 is provided with a jaw-shaped protrusion 32b and a slide guide protrusion 32d on both sides of the core recess 32a. The base of the jaw-shaped protrusion 32b includes a thin portion 32g and a deformation relief groove 32h. Further, a jaw-shaped projection pressurizing application portion 32m that fits with the jaw-shaped projection relief recess 31m when connected is provided on the inner diameter side of the jaw-shaped projection 32b. Furthermore, a recess-side end face 32f for positioning in an annular shape is provided on the inner diameter side of the slide guide protrusion 32d.

  The adjacent laminated cores 30 are brought close to each other, and the positions of the core convex portion 31a and the core concave portion 32a are aligned to obtain the states shown in FIGS. At this time, since the opening width of the core concave portion 32a surrounded by the jaw-shaped projection 32b and the slide guide projection 32d is larger than the width of the core convex portion 31a, the alignment can be performed smoothly.

Next, the connection process of the laminated core 30 will be described with reference to FIG. FIG. 28A is a plan view showing the connecting step, and FIG. 28B is an enlarged view of a main part.
By applying a force to the jaw-shaped protrusion 32b to cause deformation, the laminated core 30 is in the state shown in FIG. Due to the deformation of the jaw projection 32b, the jaw portion projection 32b and the slide guide projection 32d form a hole 32p. The core convex portion 31a is fixed by being sandwiched between the jaw-shaped projection 32b, the slide guide projection 32d, and the core concave portion 32a.
Furthermore, the rotation of the laminated cores 30 is also suppressed by fitting the jaw-shaped projection pressurizing application portion 32m and the jaw-shaped projection relief recess 31m. Thereby, the connected laminated cores 38 can be easily transported and wound as an integrated body, similarly to the laminated core 110 of the comparative example described in the first embodiment.
Here, the jaw projection 32b is connected to the plate-shaped core piece via the thin portion 32g and the deformation relief groove 32h, so that the force required to deform the jaw projection 32b can be reduced. Further, the deformation relief groove 32h suppresses out-of-plane deformation and springback, thereby improving the shape accuracy.

Next, the rounding process of the laminated core 30 will be described with reference to FIG. FIG. 29A is a plan view showing a rounding process, and FIG. 29B is an enlarged view of a main part.
The laminated core 30 is rotated as shown in FIG. 29A, and the recess-side end surface 32f and the projection-side end surface 31f are brought into contact with each other and deformed into an annular shape.
In FIG. 28 (b), the jaw-shaped projection pressurizing application portion 32m and the jaw-shaped projection relief recess 31m were in close contact. On the other hand, in FIG. 29 (b), the distance changes due to relative rotation, and the jaw shape is a portion in which a portion of the jaw-shaped projection pressurizing application portion 32m bites into the jaw-shaped projection relief recess 31m. A protrusion allowance 32n is generated. Actually, the jaw projection 32b is elastically deformed to the outer diameter side so that the jaw projection protrusion 32n becomes zero. However, a pressure corresponding to the elastic deformation is applied to the jaw projection relief recess 31m. The laminated cores 30 can be fixed by this pressurization.

The winding work is performed after the connecting step, but is omitted because it is the same as the content described in the laminated core 110 of the comparative example.
Since the laminated core of the third embodiment can manufacture the laminated core with a small mold as in the first and second embodiments, the mold cost can be reduced. Moreover, since the same equipment as the laminated core 110 of the comparative example can be used for the winding process, the equipment investment cost can be kept low. Furthermore, since the connection process is performed only once, the number of manufacturing steps can be reduced as compared with the first and second embodiments.

  As described above, the third embodiment simplifies the structure and the manufacturing method of the laminated iron core with only one step of the deformation of the jaw projection. For this reason, the laminated core and the manufacturing method thereof according to Embodiment 3 can easily connect the laminated cores, and can downsize the mold. In addition, the capital investment cost can be kept low and the number of manufacturing steps can be reduced.

  Note that the present invention can be freely combined with each other within the scope of the invention, and the embodiments can be modified or omitted as appropriate.

  Since this invention can connect a laminated core easily and can reduce a metal mold | die, laminated iron cores, such as an electric motor, and its manufacturing method can be applied widely.

Claims (13)

A laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed,
A convex portion at one end of the laminated core, a concave portion at the other end of the laminated core,
Having a notch in a part of the outer peripheral side of the recess,
The concave portion has a structure that can be deformed into a C-shape so as to form a hole surrounding the convex portion,
A part of the outer peripheral side of the recess having the notch is a thin part,
The notch may have a relief groove to allow sliding the laminated cores,
The recess is a structure that can be deformed in two stages,
A first-stage deformation that connects the laminated cores in a slidable state in the circumferential direction because the concave portion is U-shaped,
Since the concave portion becomes the C-shape, there is a second stage deformation in which the laminated cores are fixed in a state where they do not move,
A laminated iron core that can be slid in a direction in which the tooth portions of the laminated core are separated from each other without detaching the laminated cores. A laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed,
A convex portion at one end of the laminated core, a concave portion at the other end of the laminated core,
Having a notch in a part of the outer peripheral side of the recess,
The concave portion has a structure that can be deformed into a C-shape so as to form a hole surrounding the convex portion,
A part of the outer peripheral side of the recess having the notch is a thin part,
The notch has an escape groove that allows the laminated cores to slide together,
At a position in contact with the outer peripheral side tip of the concave portion, it has a structure having a protrusion extending radially on the outer peripheral side of the convex portion,
A laminated iron core that prevents the recess from returning to deformation by a springback after being deformed into the C-shape. The recess is a structure that can be deformed in two stages,
A first-stage deformation that connects the laminated cores in a slidable state in the circumferential direction because the concave portion is U-shaped,
The laminated iron core according to claim 2 , which has a second-stage deformation in which the recessed core is fixed in a state where the laminated cores do not move by being formed into the C shape. The laminated core can be accurately formed into an annular shape by a structure having a trough portion having a shape that coincides with a protrusion provided at a tip portion on the inner diameter side of the concave portion on the inner diameter side of the base portion of the convex portion. The laminated iron core according to any one of claims 1 to 3. Protrusion is provided on the inner diameter side of the base of the protrusion, and the tip of the protrusion has a right angle or an inclined structure,
The laminated iron core according to any one of claims 1 to 4, wherein a structure having a right angle or an inclination is provided on an inner diameter side of a base portion of a protrusion on an inner diameter side constituting the concave portion. A laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed,
A convex portion at one end of the laminated core, a concave portion at the other end of the laminated core,
Having a notch in a part of the outer peripheral side of the recess,
The concave portion has a structure that can be deformed into a C-shape so as to form a hole surrounding the convex portion,
The recess is a structure that can be deformed in two stages,
By making the concave portion U-shaped, the laminated cores are connected in a slidable state in the circumferential direction, and the laminated cores are slid in a direction away from each other without coming off. a modification of the first stage where Ru can,
A laminated iron core having a second stage of deformation in which the laminated cores are fixed in a state where the laminated cores do not move because the concave portion becomes the C-shape. A laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed,
A convex portion at one end of the laminated core, a concave portion at the other end of the laminated core,
Having a notch in a part of the outer peripheral side of the recess,
The concave portion has a structure that can be deformed into a C-shape so as to form a hole surrounding the convex portion,
At a position in contact with the outer peripheral side tip of the concave portion, it has a structure having a protrusion extending radially on the outer peripheral side of the convex portion,
A laminated iron core that prevents the recess from returning to deformation by a springback after being deformed into the C-shape. A laminated iron core that is formed by connecting a plurality of laminated cores in which plate-shaped core pieces having the same shape are laminated and fixed,
A convex portion at one end of the laminated core, a concave portion at the other end of the laminated core,
Having a notch in a part of the outer peripheral side of the recess,
The concave portion has a structure that can be deformed into a C-shape so as to form a hole surrounding the convex portion,
In the protrusion on the outer diameter side constituting the recess, a protrusion is provided on the inner diameter base side of the protrusion, and a trough is provided on the inner diameter tip side.
On the other hand, it has a structure having an overhang on the outer diameter side of the base of the convex part,
When the laminated cores are arranged in a straight line, the protrusions of the concave portions and the protrusions of the convex portions are in contact with each other, and the laminated cores are slid in directions away from each other without coming off. It is possible,
A laminated iron core having a structure in which when the laminated cores are arranged in an annular state, the trough portions of the concave portions and the protrusions of the convex portions are fitted. A method of manufacturing a laminated iron core in which a plurality of laminated cores are connected to form a ring,
The laminated core has a convex portion at one end, a concave portion at the other end of the laminated core, a cutout at a part of the outer peripheral side of the concave portion, and the concave portion is the convex portion Using the laminated core that can be deformed into a C shape so as to form a hole surrounding
An alignment step of inserting the convex portion of the first laminated core into the concave portion of the second laminated core;
The concave portion is deformed into a U shape to form a hole surrounding the convex portion of the first laminated core, preventing the laminated cores from coming apart, and preventing the laminated cores from coming apart. A temporary connection step that allows the teeth portions of the core to slide in a direction away from each other ;
A winding step for winding the teeth of the laminated core;
A main connecting step of deforming the concave portion from the U-shape to the C-shape and fixing the laminated cores in an annular shape;
A method for manufacturing a laminated iron core comprising: The method for manufacturing a laminated iron core according to claim 9 , wherein in the winding step, the winding is wound around the plurality of teeth portions simultaneously. The manufacturing method of the laminated iron core according to claim 9 or 10 , wherein in the temporary connecting step, the outer peripheral sides of the plurality of concave portions are simultaneously deformed. In the main connection step, after the laminated core is deformed in an annular shape, the outer shape of the laminated core is pressurized from the outer periphery, and the outer diameter side of the concave portion is deformed simultaneously to form an annular laminated iron core. Item 11. The method for manufacturing a laminated iron core according to Item 9 or Item 10 . In the main connection step, after the laminated core is deformed in an annular shape, the inner diameter side and the outer diameter side of the laminated core are pressurized, and the outer diameter side of the concave portion is deformed in order to obtain an annular laminated core. The manufacturing method of the laminated iron core of Claim 9 or Claim 10 which forms.

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